The PGA870 is a wideband programmable-gain amplifier (PGA) for high-speed signal chain and data acquisition systems. The PGA870 has been optimized to provide high bandwidth, low distortion, and low noise, making it ideally suited as a 14-bit analog-to-digital converter (ADC) driver for wireless base station signal chain applications. The wide gain range of –11.5 dB to +20 dB can be adjusted in 0.5-dB gain steps through a 6-bit control word applied to the parallel interface. The gain control interface may be configured as a level-triggered latch or an edge-triggered latch, or it may be placed in an unlatched (transparent) mode. In addition to the 6-bit gain control, the PGA870 contains a power-down pin (PD) that can be used to put the device into a low-current, power-down mode. In this mode, the quiescent current drops to 2 mA, but the gain control circuitry remains active, allowing the gain of the PGA870 to be set before device power-up. The PGA870 is offered in a QFN-28 PowerPAD™ package.
PowerPAD is a trademark of Texas Instruments.
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|Part number||Order||PGA/VGA||Number of channels (#)||Vs (Min) (V)||Vs (Max) (V)||BW @ Acl (MHz)||Acl, min spec gain (V/V)||Gain (Max) (dB)||Slew rate (Typ) (V/us)||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)|
||VGA||1||4.75||5.25||650||0.27||20||2900||-40 to 85||VQFN | 28||28VQFN: 25 mm2: 5 x 5 (VQFN | 28)|